package com.can.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.can.reggie.common.R;
import com.can.reggie.entity.Employee;
import com.can.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

/*
* 员工的管理
* */
@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     *
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {
        //1、将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2、根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<Employee>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee employee_result = employeeService.getOne(queryWrapper);

        //3、如果没有查询到则返回登录失败结果
        if (employee_result == null) {
            return R.error("登录失败");
        }

        //4、密码比对，如果不一致则返回登录失败结果
        if (!employee_result.getPassword().equals(password)) {
            return R.error("登录失败");
        }

        //5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (employee_result.getStatus() == 0) {
            return R.error("账户已被禁用");
        }

        //6、登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee", employee_result.getId());
        return R.success(employee_result);
    }


    /**
     * 员工退出
     *
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //清理Session中保存的当前登录员工的id
        request.getSession().getAttribute("employee");
        return R.success("退出成功");
    }


    /**
     * 新增员工
     *
     * @param request
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {

        //设置初始密码123456,需要md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

       /* 用MyMetaObjecthandler类自动填充
       //设置创建时间,修改时间,创建人,修改人
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);*/

        //往数据库中 添加员工
        boolean flag = employeeService.save(employee);

        return R.success("员工添加成功^_^!");

    }


    /**
     * 分页展示员工信息
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
//        log.info("page = {} , pageSize = {} ,name = {} ,",page,pageSize,name);

        //创建分页构造器
        Page pageInfo = new Page(page, pageSize);

        //创建条件构造器
        LambdaQueryWrapper<Employee> lqw = new LambdaQueryWrapper<>();
        //添加过滤条件,和排序条件
        lqw.like(StringUtils.isNotEmpty(name), Employee::getName, name).orderByDesc(Employee::getUpdateTime);

        //执行查询, 最终封装进 pageInfo
        employeeService.page(pageInfo, lqw);

        return R.success(pageInfo);
    }


    /**
     * 根据id修改员工信息
     *
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request, @RequestBody Employee employee) {
//        log.info(employee.toString()+"--------------");
//        log.info("线程id为: {}", Thread.currentThread().getId());

        /*
        用mp中的MyMetaObjecthandler类中的方法,进行自动填充
        Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setUpdateUser(empId);
        employee.setUpdateTime(LocalDateTime.now());*/



        boolean flag = employeeService.updateById(employee);

        if (flag) {
            return R.success("员工信息修改成功");
        }

        return null;
    }


    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id ){

        Employee employee = employeeService.getById(id);
        if (employee!=null){
            return R.success(employee);
        }
        return R.error("未查询到该员工信息");
    }
}